Allowable Bearing Capacity of Shallow Foundations: Research Paper

Summary

Shallow foundations are a key topic in civil and geotechnical engineering. Students learn how to determine the allowable bearing capacity of shallow foundations using shear wave velocity.

Historical background

The classical theory of ultimate bearing capacity is explained. The principles of plastic equilibrium are reviewed. Sources of approximations in the classical theory are discussed.

Empirical formulation

An empirical formulation for allowable bearing capacity is proposed. The formulation uses shear wave velocity and unit weight. The unit weight can also be determined using P-wave velocity.

Comparison with classical theory

The proposed formulation is compared with the classical theory. The proposed method is shown to be reliable and safe. The method is also cost and time-saving.

Case histories

Case histories of site investigations are discussed. The proposed formulation is tested against these case histories. The formulation is shown to be consistent with the classical theory.

Key terms

Allowable bearing capacity

The maximum pressure that soil can bear without failing.

Shear wave velocity

The speed at which shear waves travel through soil.

Unit weight

The weight per unit volume of soil.

P-wave velocity

The speed at which P-waves travel through soil.

Plastic equilibrium

A state where soil deforms without increasing stress.

Failure modes

The ways in which soil can fail under load.

Questions this document helps with

• What is the allowable bearing capacity of shallow foundations?
• How is shear wave velocity used to determine bearing capacity?
• What are the different failure modes of soil under load?

Summary written with AI from the document's text.